// 实现这个项目的构建任务
const {src,dest,parallel,series,watch} = require('gulp')
const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()
const del = require('del')
const browserSync = require('browser-sync')
const bs = browserSync.create()
const data = {
    menus: [
        {
        name: 'Home',
        icon: 'aperture',
        link: 'index.html'
        },
        {
        name: 'Features',
        link: 'features.html'
        },
        {
        name: 'About',
        link: 'about.html'
        },
        {
        name: 'Contact',
        link: '#',
        children: [
            {
            name: 'Twitter',
            link: 'https://twitter.com/w_zce'
            },
            {
            name: 'About',
            link: 'https://weibo.com/zceme'
            },
            {
            name: 'divider'
            },
            {
            name: 'About',
            link: 'https://github.com/zce'
            }
        ]
        }
    ],
    pkg: require('./package.json'),
    date: new Date()
}
const style =() =>{
    return src('src/assets/styles/*.scss',{base:'src'}) 
        .pipe(plugins.sass({outputStyle:'expanded'}))
        .pipe(dest('temp'))   
}

const scripts =() =>{
    return src('src/assets/scripts/*.js',{base:'src'}) 
        .pipe(plugins.babel({presets:['@babel/preset-env']}))
        .pipe(dest('temp'))  
}

const page = () =>{
    return src('src/*.html',{base:'src'}) 
        .pipe(plugins.swig({data}))
        .pipe(dest('temp'))  
}
const image =() =>{
    return src('src/assets/images/**',{base:'src'}) 
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))  
}
const font =() =>{
    return src('src/assets/fonts/**',{base:'src'}) 
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))  
}

const extra =() =>{
    return src('public/**',{base:'public'}) 
        .pipe(dest('dist'))  
}
const clean =() =>{
    return del(['dist','temp'])
}

const serve = () => {
    watch('src/assets/styles/*.scss',style)
    watch('src/assets/scripts/*.js',scripts)
    watch('src/*.html',page)
    // watch('src/assets/images/**',image)
    // watch('src/assets/fonts/**',font)
    // watch('public/**',extra)
    watch([
        'src/assets/images/**',
        'src/assets/fonts/**',
        'public/**'
    ],bs.reload)
    bs.init({
        notify:false,
        port:8000,
        files:'temp/**',
        server:{
            baseDir:['temp','src','public'],
            routes:{
                '/node_modules':'node_modules'
            }
        }
    })
}
const useref = () =>{
    return src('temp/*.html',{base:'temp'})
        .pipe(plugins.useref({searchPath:['temp','.']}))
        //html css js 压缩
        .pipe(plugins.if(/\.js$/,plugins.uglify()))
        .pipe(plugins.if(/\.css$/,plugins.cleanCss()))
        .pipe(plugins.if(/\.html$/,plugins.htmlmin({collapseWhitespace:true})))
        .pipe(dest('dist'))
}
const allCompile = parallel(style,scripts,page)
const build = series(clean,parallel(series(allCompile,useref),extra,image,font)) 
const dev = series(allCompile,serve)
module.exports = {
    clean,
    build,
    // serve,
    dev
    // useref
}